ELJ-RF2N7ZFB Equivalent & Substitute Parts

Part Overview

The ELJ-RF2N7ZFB is a 2.7 nH unshielded multilayer inductor manufactured by Panasonic Electronic Components in the 0402 (1005 Metric) surface mount package. This component is designed for high-frequency applications requiring low inductance values with a maximum DC resistance of 100mOhm and a current rating of 400 mA. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

ELJ-RF2N7ZFB

Panasonic Electronic ComponentsIn Stock: 890ELJ-RF2N7ZFB Datasheet

Current PartRFQ

MLG1005S2N7CT000

TDK CorporationIn Stock: 18387MLG1005S2N7CT000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-RF2N7ZFB is determined by the following critical parameters:

• Inductance Value: Must match 2.7 nH with tolerance ±0.2nH
• Package / Case: Must be 0402 (1005 Metric) for mechanical and electrical compatibility
• Mounting Type: Must be Surface Mount
• Shielding Configuration: Must be Unshielded to maintain electrical characteristics
• Current Rating: Substitute must support minimum 400 mA operation
• DC Resistance: Substitute DCR must not exceed application requirements

The MLG1005S2N7CT000 from TDK Corporation meets these substitution criteria. It maintains identical inductance value, tolerance, package dimensions, and mounting type. The substitute provides enhanced electrical performance with higher current rating (800 mA) and improved temperature range (-55°C ~ 125°C), making it suitable for applications previously served by the obsolete Panasonic component.

Parameter Comparison

Engineering Selection Recommendations

The MLG1005S2N7CT000 is the direct substitute for the obsolete ELJ-RF2N7ZFB. Selection is based on the following factors:

Product Status: The ELJ-RF2N7ZFB is obsolete, while the MLG1005S2N7CT000 is active and in production, ensuring long-term availability and supply chain continuity.

Compliance & Certifications: The MLG1005S2N7CT000 carries ROHS3 compliance certification, meeting current regulatory requirements. Both components are REACH Unaffected and classified as EAR99 for export control purposes.

Electrical Compatibility: Identical inductance value (2.7 nH) and tolerance (±0.2nH) ensure functional equivalence in circuit operation. The substitute's higher current rating (800 mA vs. 400 mA) and extended operating temperature range (-55°C ~ 125°C vs. -20°C ~ 85°C) provide design margin for demanding applications.

Mechanical Compatibility: Identical package dimensions (0402 / 1005 Metric) and mounting type (Surface Mount) ensure direct PCB footprint compatibility without layout modifications.

Design Considerations: The substitute exhibits slightly higher DC resistance (150mOhm Max vs. 100mOhm Max) and marginally lower Q factor (7 vs. 8 @ 100MHz). These differences are within acceptable tolerances for most RF and high-frequency applications. The higher self-resonant frequency (6GHz vs. 5.5GHz) provides improved performance at elevated frequencies.

Frequently Asked Questions (FAQ)

Q: Can the MLG1005S2N7CT000 be used as a direct replacement for the ELJ-RF2N7ZFB?

A: Yes. Both components share identical inductance value (2.7 nH), tolerance (±0.2nH), package type (0402 / 1005 Metric), and mounting configuration (Surface Mount). The substitute is mechanically and electrically compatible for direct PCB substitution.

Q: What are the key differences between these two inductors?

A: The primary differences are current rating (800 mA vs. 400 mA), operating temperature range (-55°C ~ 125°C vs. -20°C ~ 85°C), DC resistance (150mOhm Max vs. 100mOhm Max), and product status (Active vs. Obsolete). The substitute provides enhanced performance specifications and regulatory compliance.

Q: Does the higher DC resistance of the substitute affect circuit performance?

A: The difference in DC resistance (50mOhm) is application-dependent. For most RF and high-frequency circuits, this variance falls within acceptable design margins. Circuit simulation or testing may be warranted for applications with stringent loss requirements.

Q: Are there any packaging or handling differences?

A: The ELJ-RF2N7ZFB is supplied in standard packaging, while the MLG1005S2N7CT000 is supplied in Tape & Reel (TR) format. Both components have identical Moisture Sensitivity Level (MSL 1 - Unlimited), requiring no special storage precautions.

Q: Is the substitute compliant with current regulatory standards?

A: Yes. The MLG1005S2N7CT000 is ROHS3 compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic components.